Install VirtualBox https://www.virtualbox.org/wiki/Downloads Install Vagrant (http://vagrantup.com/v1/docs/getting-started/index.html)
First import the box you will be using in production
Ubuntu 10.04 Lucid Lynx 32 bit. vagrant box add precise32 http://files.vagrantup.com/precise32.box
Other boxes are available here http://www.vagrantbox.es/